0.040 inch.
0.060 Plug gap.
0.035
.060
.40 gap
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The 1998 Chevrolet Silverado V-8 engine spark plug gap is .031. Most spark plugs come pre-gapped from the spark plug manufacturer.
"Where is the oil plug located for a 2008 Chevy silverado ext cab?"
100.5 mm
.035
0.060
,030"
.035